3results about How to "Good purity" patented technology

This invention discloses a samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material, its preparation method, and its applications. The samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material belongs to the monoclinic crystal system, has a space group of Cm, and a chemical formula of Sm. 0.3 La 0.1 :Y 0.6 Ca4O(BO3)3 has a second harmonic response intensity of 0.89 × KDP, and exhibits transmittance exceeding 80% in the 500–1000 nm and 1600–2400 nm wavelength ranges. It also has a strong absorption peak in the 1000–1600 nm wavelength range. Therefore, the samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal can be considered as a nonlinear optical crystal material with broad application prospects in the field of optics.

The invention discloses a lanthanum ion doped oxygen calcium yttrium borate nonlinear optical crystal material and a preparation method thereof, the lanthanum ion doped oxygen calcium yttrium borate nonlinear optical crystal material belongs to a monoclinic system, the space group is Cm, the chemical formula is La0.1: Y0. 9Ca4O (BO3) 3, the frequency multiplication coefficient is 2 * KDP, the ultraviolet cut-off edge is less than 200 nm, and no absorption peak with the intensity greater than or equal to 0.2 cm <-1 > exists in the range of 200-2500 nm. Therefore, the lanthanum ion doped yttrium calcium oxide borate crystal can be used as a nonlinear optical material with a wide application prospect in the field of optical parameter chirped pulse amplification.

The application provides a multi-layer penetration controlled-release acid preparation and a preparation method thereof, and belongs to the field of cosmetics. The preparation is composed of Aspergillus oryzae fermentation substrate freeze-dried powder, composite alpha-hydroxy acid, salicylic acid, poloxamer 407, polyhydric alcohol and non-ionic surfactant. The freeze-dried powder is obtained by co-fermenting olea europaea leaves and curcuma and refining through ultrafiltration. A temperature-sensitive phase change system is constructed by using poloxamer, so that the product is changed from a liquid state to a gel state at body temperature, and the synergistic controlled release of acid components and bioactive substances is realized. The preparation process adopts low-temperature swelling and vacuum freeze-drying technology, so that the stability of the system and the efficiency of the active substances are ensured. The application significantly reduces the irritation of high-concentration acid, improves the black suppression and repair effect, and is suitable for precise improvement of hyperpigmentation problems such as chloasma.